He has his good days and his bad days. He still sees friends. Company is good for him. He is still signing books. But he is not able to conduct any business or make any speeches.
He goes to the office everyday and sees his friends and has lunch and shoots the bull, ... I think he is doing well. He will be 84 next month. I don't know many people that age who don't have problems.
Microsoft sees software as a service as a part-answer to the maturing software market.